ama573
Parking Attendant
Posts: 30
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posted January 12, 2013 02:45 PM
Extended tail for LSR
LSR guys, any top speed to be gained by adding a 6" extended tail on a standard wheelbase ZX14?
   
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BobC
Pro
Posts: 1736
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posted January 13, 2013 12:26 AM
Keith Parnell used an extended tail on his ZX-12R to good effect.
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Candy Thunder Blue 2006 ZZR1400
Stock wheelbase
Max: 205.4 mph in 1.25 miles
2012 ZZR1400 in Golden Blazed Green
Brock CT Full System. etc
Max: 203.1 in 1 mile (so far)
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BobC
Pro
Posts: 1736
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posted January 13, 2013 08:04 AM
 Edited By: BobC on 13 Jan 2013 16:18
Keith's bike is now owned by Phil Steele and still running in competition in the UK. I've seen one like this running in the US too.
Not sure who makes these tails but a low coefficient of drag is also about how airflow leaves the bike so they must help. There is also a multiple speed record holder in the UK called Alan Tinnion who had a Yamaha R6 with that type of tail.
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Candy Thunder Blue 2006 ZZR1400
Stock wheelbase
Max: 205.4 mph in 1.25 miles
2012 ZZR1400 in Golden Blazed Green
Brock CT Full System. etc
Max: 203.1 in 1 mile (so far)
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Oz Booster
Expert Class
Posts: 230
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posted January 13, 2013 11:47 AM
Sometimes the tail length is just used to change classes
it may help a little but the air is so disturbed by the time it gets to the backend on a standard type body i don't think you will get much gain
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entropy
Moderator
Posts: 8671
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posted January 13, 2013 01:49 PM
quote:
Sometimes the tail length is just used to change classes
it may help a little but the air is so disturbed by the time it gets to the backend on a standard type body i don't think you will get much gain
... and this guy ought to know, yup... 
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This moderator uses moderation in moderation
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Oz Booster
Expert Class
Posts: 230
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posted January 13, 2013 03:33 PM
You have more confidence in me than i do Karl  , most of my stuff is outright hp, i'm trying to get the aerodynamics better this yr
Some of the 1 mile guys may have a more back to back data than i do,
but my opinion for what its worth, is the big tail may not be worth mph for outright aero advantage it will increase downforce at the rear
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